Answer:
You can read it both ways, I wear; One way it's a number, reversed a snare.
What can be forever wound up but never annoyed?
A mighty weapon in the war against winged household pests.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
Break it and it is better, immediately set and harder to break again
What is yours but only used by others?